* {
    margin: 0;
    padding: 0;
    color: #666;
    list-style-type: none;
    outline: none;
    font-family: 'PingFang SC', "Microsoft YaHei", "sans-serif", "serif";
    font-size: 14px;
}

a {
    text-decoration: none;
}

.color-orange {
    color: #fe763a;
}

.color-blue {
    color: #03a9f4;
}

.color-blue {
    color: #944f16;
}

.back {
    position: fixed;
    right: 10px;
    top: 10px;
    font-size: 14px;
}